240139872 has 144 divisors (see below), whose sum is σ = 814544640. Its totient is φ = 65615616.

The previous prime is 240139847. The next prime is 240139897. The reversal of 240139872 is 278931042.

It is an interprime number because it is at equal distance from previous prime (240139847) and next prime (240139897).

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43779 + ... + 48957.

It is an arithmetic number, because the mean of its divisors is an integer number (5656560).

Almost surely, 2^240139872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 240139872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (407272320).

240139872 is an abundant number, since it is smaller than the sum of its proper divisors (574404768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

240139872 is a wasteful number, since it uses less digits than its factorization.

240139872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5225 (or 5214 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 240139872 is about 15496.4470766689. The cubic root of 240139872 is about 621.5672040856.

The spelling of 240139872 in words is "two hundred forty million, one hundred thirty-nine thousand, eight hundred seventy-two".